I am scheduled to play the Dittersdorf Sinfonia Concertante for Bass and Viola, and the violist wants to play an edition that has a cadenza. The editions I have found so far do not contain cadenzas. I found this performance on You Tube: Does anyone know what edition they are using in that performance? My viola player says there is also at least one other edition that includes a cadenza. Any help would be appreciated. Thanks.